Niantic has new Pokémon Go events to focus on but summer is still Go Fest’s ‘sacred window’
Pokémon Go essentially runs an event every week, but Go Fest is by far the biggest, essentially taking over the summer. Locking the event to a specific timeframe is something the community thinks might limit certain elements of what Niantic can offer with it, but summer is a “sacred window” for Go Fest that won’t be changed.
It isn’t that Niantic is unaware of demand for more large-scale events outside of that summer season, but, according to Pokémon Go director Michael Steranka, it fits perfectly with what the team is aiming to accomplish with Go Fest.